The product is formed with high quality welded tube and advanced galvanization technology and equipment. The galvanization layer is equally galvanized and smooth finished. Both inside and outside surface are smooth, without black spot or bleb. It features high corrosion resistance, widely used for scaffolding construction and highway.
ASTM A53
Nominal Diameter (inch)
Outside Diameter (mm)
Wall Thickness (mm)
Standard Weight Class
Overpressure Resistant Code
Class A Test Pressure (Mpa)
Weight (Black Tube) (kg/m)
1/2"
21.3
2.77
STD
40
4.83
1.27
3/4"
26.7
2.87
STD
40
4.83
1.69
1"
33.4
3.38
STD
40
4.83
2.50
1-1/4"
42.2
3.56
STD
40
8.27
3.39
1-1/2"
48.3
3.68
STD
40
8.27
4.05
2"
60.3
3.91
STD
40
15.86
5.44
2-1/2"
73.0
5.16
STD
40
17.24
8.63
3"
88.9
5.49
STD
40
15.31
11.29
4"
114.3
6.02
STD
40
13.1
16.07
BS31-1940
Nominal Dia. (in)
Outside Diameter(mm)
Wall Thickness
Nominal Weight Screwed Without Coupler
Min
Std
Max
Nominal
Minimum
mm
mm
Kg/m
1/2"
12.43
12.7
12.73
1.42
1.32
0.40
3/4"
18.76
15.05
19.08
1.63
1.52
0.69
1"
25.11
25.4
25.43
1.63
1.52
0.95
1-1/4"
31.46
31.75
31.78
1.63
1.52
1.21
1-1/2"
37.8
38.1
38.13
1.83
1.73
1.64
2"
50.5
50.8
50.83
2.03
1.93
2.44
2-1/2"
63.2
63.5
63.53
2.03
1.93
3.03
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